Expanding mold



No. 770,677. PATENTED SEPT. 20, 1904.

L. GUATT.

EXPANDING MOLD.

APPLICATION FILED JAN. 27. 1904.

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Patented September 20, 1904:.

PATENT FFIQE.

LEWIS CUATT, OF UNION CITY, MICHIGAN.

EXPANDING MOLD.

SPECIFICATION forming part of Letters Patent No. 770,677, dated September 20, 1904.

Application filed January 27, 190 1.

To all whmn it ntay concern:

Be it known that I, LEWIS CUATT, a citizen of the United States, and a resident of Union City, Branch county, State of Michigan, have invented certain new and useful Improvements in Expanding Molds; and my preferred manner of carrying out the invention is set forth in the following full, clear, and exact description, terminating with claims particularly specifying the novelty.

This invention relates to apparatus for forming plastic blocks, more especially to that class called expanding molds; and the objects of the same are to construct a mold of this character whose parts shall be interchangeable and to provide improved means for raising the bottom.

To this end the invention consists in the details described below and illustrated in the drawings, wherein- Figure 1 is a perspective view of this mold. Fig. 2 is a perspective view with one side and both ends partially open and the other side removed. Fig. 3 is a section on line 00 :20, Fig. 2.

The bed of this machine comprises a rectangular frame 1, from whose corners project right-angular brackets 2, all these parts being rigid and suitably supported. The sides 3 and ends 4: (herein called members) are supported on the bed in like manner, and a description of one will suffice for all.

5 represents bearing-blocks slotted at 6 for the reception of bolts 7, which pass through the brackets 2 to permit the blocks to be adjusted from or toward the center. There is a pair of such blocks for each member and in them are journaled stub-shafts 8, projecting from the extremities of a rock-bar 9, which when upright stands about flush with the upper face of the bottom board. The member supported by this rock-bar has strips 10, slotted as at 11, whereby it is vertically adjustable by means of bolts 12, which pass through the rock-bar. Two of the members, as the ends 4:, have books 20 projecting beyond their upper corners, and the other two members have latches 21, which engage the hooks when all the members stand vertical. It will be clear that when a larger mold is required the end members (if the product is to be longer) must and hence different members within the limits of the size of the machine can be supported on the same rock-bars. So, also, with members of different height.

The bottom 10 is here shown as a flat board, and one of different size will replace the one illustrated when a product of different size is to be produced. I have discovered that this bottom board often warps, shrinks, and swells, and it is therefore desirable that firm and positive means be employed for raising it bodily upward and pressing it closely against the edges of all the members. For this purpose I employ a pair of levers 30, each pivoted at 31 in one side of the bed with its handle projecting beyond the other side, and to this lever is pivoted at 32 a T-shaped cam 33, whose outer and wider end has projections 34 resting upon beveled notches 35, cut in the ends of the bed. Whenever the lever is moved in the proper direction, its cam is forced out ward, and the projections, riding up the beveled notches, cause the head of the cam to rise. When both cams are thus elevated, the bottom 10 is raised firmly by their heads, which extend entirely across beneath each end of the bottom board.

I have not illustrated a plunger for the reason that this mold is capable of producing a product which is allowed to set, or it could be employed in producing a product which is made under pressure, all without departing from the spirit of my invention.

The parts are of proper sizes, shapes, proportions, and materials, and additions or slight alterations may be made as necessity requires.

What is claimed as new is 1. In a mold, the combination with the bed having right-angular brackets at its corners, a bottom, and interchangeable upright members; of a pair of bearing-blocks secured to each pair of parallel brackets with means for radial adjustment, a rock-bar pivoted between said blocks, and upright straps on the various members correspondingly spaced from each Ether and detachably connected with said rock- 2. In a mold, the combination with the bed having right-angular brackets at its corners, a bottom, and interchangeable upright members; of a pair of bearing-blocks secured to each pair of parallel brackets with means for radial adjustment, a rock-bar pivoted between said blocks, upright straps on the various members correspondingly spaced from each other and provided with slots, and bolts passing through the rock-bars and engaging said slots to permit vertical adjustment of the members.

3. In a mold, the combination with the bed, the upright members, and the bottom; of means for raising the bottom consisting of two T-shaped cams with their heads remote from each other, projections on said heads,

inclined supports on which the projections rest, and mechanism for moving the cams away from each other.

4:. In a mold, the combination with the bed, the upright members, and the bottom; of means for raising the bottom consisting of two T-shaped cams with their heads remote from each other, projections on said heads, beveled notches in the ends of the bed on which the projections rest, and levers pivoted to the shanks of the cams and fulcrumed in the bed with their handle ends projecting from the same.

In testimony whereof I have hereunto subscribed my signature this the 22d day of J anuary, A. D. 1904.

LEWIS CUATT.

Witnesses:

GEO. STYLEs, CHARLES OLIVER. 

